Method and device for producing compressed gas from liquefied gas



July 7, 1931- c. w. P HEYLANDT 1,812,954 METHOD AND DEVICE FOR PRODUCINGCOMPRESSED GAS FROM LIQUEFIED GAS Filed Jan. 3, 1930 C .VI/J H jhn tlied state ascomp amount of compression work Patented July '7, 1931UNlT-EDSTATES CHRISTIAN PAUL OI BERLIN-FRITZ, GERMAN mHOD AND DEVICE1'03 PRODUCING COMPRESSED GAS Application Med January a, 1930, Serialno.

The present invention relates to an imrovement in processes andapparatus for de- 'vering pressure gas, the principal object of theinvention being to provide an improved process and apparatus by means ofwhich the gas may be conveyed in liquefied state to the place ofconsumption and there delivered in ighl compressed us condition.

I It as heretofore been the practice, in the handling of gum having alow boiling point, such as nitrogen, oxygen and the like, to vaporizethe gas and compress it to the desired ressure in heavy steel bottlesbefore transporting it to the place of consumption. The -1 object of thepresent invention, however, is to provide means whereby not only will itbe possible to transport the gas in liquefied condition and deliver itat any desired pressure, thereby eliminating the high cost of transg0porting the heavy steel bottlesnecessary for containing the compgas,.but utilizing the ordinarily undesirable vaporization pr ucts.formed durin transegortationto assist in transferring the uefi gas fromits stor-' age receptacle and de ivering it in vaporized condition atthe desired pressure. 1 According to the invention the ases, such asoxygen, nitrogen, methane an the like, after being transported in aliquefied state to the place of consumption, are transferred there fromthe transporting vessel or from another receptacle capable of standing ahigher or lower ressure by the aid of a conveying device, gdr instance apump, into a high pressure system of race tacles or pumps, where the gasy the aid 0 known means is evaporated and raised tothe required workingpressure.

Such a processhas considerable advantages over those heretofore known.Afart from the advanta e gained by the consi erably reduced cost 0transporting the gases in liquewith the transportation in heavy steelbottles, the

necessary at the of consumption is' very small as the gases in relationto the liquid of compressed gases place volume ofsuch be consi is in theproportion of 800 1. ,It must further cred ing been conveyed by t thatthe liqluefied gas after have liquid pump may that the pressure gas whenproduce -ton rod beyond the source of power.

418,345, and in Germany January 5, 1929.

raou LIQUEFIED GAS beconverted from the liquid to the gaseous statepartly or entirely by alone, which may heat from without.

self-compression be produced by admitting It need not be emghasized inthis manner at the place of consumption from the liquid material is intion.

a perfectly -dry condi- A device enabling the utilization of theundesired products of vaporization according to .0

my invention is illustrated in the accompanyin drawing.

eferring to the drawing a designates-a double-walled'insulated containeror vessel adapted tocontain a liquefied gas for transa portation to theplace of use. A second double-walled, insulated casing b communicatesbyway of a valved pipe d with the interior of the vessel 0 at thelowermost point thereof,

the said pipe being the casing wall of said housing being spaced innerwall of to provide a space fied gas within said also insulated. Within bis disposed a pump housing 1), the

from th the insulating casing thereby for the reception of liquecasingso as to completely ll envelope the pump housing. The housing 11communicates by way of a vaporizer c the outlet fromadapted forconnection with a vessel. The piston 17 of the by a rod 7, which extendst ing it within which a second cured to the rod f.

pipe e with a which may be high-pressure urnp is carried rough a houspiston g is se- The extension of the pishousing h is designated.

i and is driven through the medium of a con- I necting rod is from acrank shaft which in,

turn may be op The housing h is with a lid or cover thrgu erated. fromany suitable provided h which passes a pipe I in communication wlth thespace 9 at the u per part .of the container a, above the liqui in saidcontainer. The housing h fur ther communicates.with the pipe I, andthereforewith the space got the by way through of a-pipe a: w

iquid container, hich enters the housing the bottom thereof, the pipes land a:

being provided with valves n and n respectivel as 0m the space g na telyto opposite sides of the piston g.

which are operative to admit pressure of the container a alter-' Thelot) pipe Z is further provided with a valve 3/ ,service pipe line inordertomake them availor-s'hutting off all communication between ablefor use as high pressure (gas. This prest e'housing hand the containera, The houssure gas may then be allowe to pass nto a ing it is providedadjacent its opposite ends power engine aggregate (cylinder with PIS-with a pair of outlet ports communicating by ton, turbine or the l1k e)and w th the power a pipe 1' was an exhaust pipe m, the pipe 1' thusobta ned the hquld delivering aggregate mg provided with valves t, tdisposed rewill require very much less mechan cal work spectively atopposite side's'ofits connection fordriving thesame." 7 u with the pipem, the opening and closing of I claim as my invention: said valves beingcontrolled by the movements 1; The method of producing pressure gas a ofthe piston gin opposite directions;for'ex-.: from liquefied gasoflowboilingpomt, which hausting the housing it. The housing It is consistsin transferring the gas in liquefied further provided in its top andbottom with: state from a closedistorag'e vessels-belowventilatingportscontrolled by valves 8 and pressure chamber, mechanicallytransferring s respectively, which ma-y be manually theliquefiedgasfrom" said low pressure an opened if for any reason the pressure in thecamber to ahigh pressure chamber, utiliz- I space 9 has fallen'so lowthat it is no longer ing the working pressure of "the gas in the capableof assisting to drive tliepiston g, in storage vessel to assist 1n'drivingfthe mewhich case the valvey is closed. The exhaust chanicaldevice which transfersthelliquefied pipe m is provided with a non returnvalve 11;, gas to the high pressure chamber, and vapor- 85 ssuming'thatduring transportation of izing said gas'and' converting itinto'gas ofthe liquefied gas, or while no withdrawal predetermined high pressure. qi thereof is taking place the pressure Within the 2; An apparatus forproducing pressure spacey of the vessel ahas for'instance been gasfromfliquefied'gas of low boiling point,

increasedto5 atmospheres and inca'sejof sta-' comprising in combination,an. insulated, 90 ti'onary apparatus to 15atrn'ospheres. If now closed,"low pressure storage vessel, alsecond after the place of consu' ption*has' been insulated,clo'sed, vessel1 communicating with reached and theWithdrawal of'theliquefied said low l-.pressure vessel 'b elow itsliquid gas has begun by startingthe liquid pump 12, level, a pressurepump disposed within said so the pressure existing above, the liquid inthe second vessel, a piston infsaidpump having 95 vessel a will act uponthe piston 9' so that a a 'rodextendingoutside of said second ves partof the power necessary for driving the se'l, a housing outside of saidsecondfvessel pumpis supplied by the pressure of'the 1111? andhavin'ganj axial opening for. the passage es'ired'products ofvaporization. ofsaid piston rod th'erethrough,f a piston for any reason the pressureprevailing secured said rod within said housing, 1 00 above theliquid'in the transport ngivesscl valve-controlled,communicatingcmeanscom has fallen to" such an extent that it is notneeting -said. housing at opposite sides of its worth while touse it''for" assisting to drive piston With'said low pressure "vessel above itsthe liquid pump, the valve is closed, In liquid level, 'tlierebyutoadmit pressure gas 40 order to avoid the production ofobjectionable fromsaid vessel tothe housing to assist in 105 compression Within the casingIt, the valves 8 causing reciprocation of said piston rod and and 8communicating respectively with the pistons,v means-for permittingexhaust of casing it at its upper and lower ends, are pressure gasesfrom said ho ing" at oppoopened' The non-return valve u disposedlin sitesides of its piston, mechanical means the conduit m prevents the returnof pres connected with said piston rod for reciprocat- 110 sure gas fromsaid pipe to the housing hand ing the same and a vaporizer communicatoutthrough the open valves s-and s. ting with's'aid pump. j ,7

i If the pipeline Z is shut olf by' the closing In testimony whereofIafliirmysignature; of valve 3 as above described, the pressure ,f CHRISTI ANWI |.HLM PA1]L HEYLANDT. within thespace g'of'vesselawill act'onthe Y .f

115 liquid,whereby the suction effect of the ump h is increased and theload partially taken ofi from'the driving machine. v

[An advantageousdevelopment of theproco a I a 55, ess is thatthetransporting vessel,. or there-M 1 Q f i I 12 0 ceptacle mama hegasprior to its" trans-' due ga h p ed ermi d p rew'hich j .i j .7"? j i asm installation .1." Itwillthen only be neces sarl'y that the gases fromthe liquid container. be rou'ght toa;slightlyvhigher pressure than q Vusually required by self-compression in the ,1 I a p 3 j 13o

